40 Main Processor Module
Trident Planning and Installation Guide
Alarm Contacts
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Feature Specification
Alarm contacts 2, redundant pair, isolated
Rated voltage ±24 V AC/DC
Operational voltage range 0–30 V DC
Maximum switch voltage 33 V
Maximum switching power 15 W resistive
Maximum off-state leakage <50
µA
Maximum nominal current 0.5 A per contact, continuous
0.7 A per contact for 100 ms
Voltage drop @ baseplate <0.25 V DC @ 0.5 A
Fuses, mounted on baseplate 1 per contact, 1 A fast-acting
Blown-fuse indicator On baseplate
Contact-to-protective-earth isolation 500 V DC, minimum
Contact-to-functional-earth (logic)
isolation
800 V DC, minimum
Simplified
Schematic of MP
Redundant Alarm
Circuit
Alarm 1/NC
A2/NClarm
A 1/Clarm
A 2/Clarm
MP A
MP B
MP C
MP Baseplate
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